21012010112112 has 80 divisors (see below), whose sum is σ = 54309873945600. Its totient is φ = 7000282020096.

The previous prime is 21012010112101. The next prime is 21012010112123. The reversal of 21012010112112 is 21121101021012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21012010112101) and next prime (21012010112123).

It is a junction number, because it is equal to n+sod(n) for n = 21012010112091 and 21012010112100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154560389 + ... + 1154578587.

It is an arithmetic number, because the mean of its divisors is an integer number (678873424320).

Almost surely, 2^{21012010112112} is an apocalyptic number.

It is an amenable number.

21012010112112 is an abundant number, since it is smaller than the sum of its proper divisors (33297863833488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012010112112 is a wasteful number, since it uses less digits than its factorization.

21012010112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29670 (or 29664 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21012010112112 its reverse (21121101021012), we get a palindrome (42133111133124).

The spelling of 21012010112112 in words is "twenty-one trillion, twelve billion, ten million, one hundred twelve thousand, one hundred twelve".